Sybase - null values for columns mapped as "boolean" are persisted as 0 (zero) instead of NULL ---------------------------------------------------------------------------------------------- Key: HHH-3716 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3716 Project: Hibernate Core Issue Type: Bug Components: core Environment: Sybase Reporter: Gail Badner Assignee: Gail Badner Fix For: 3.2.x, 3.3.x, 3.4 Null values for columns mapped as "boolean" are persisted as 0 (zero) instead of NULL. This happens because Hibernate persists a null Boolean value by calling: PreparedStatement.setNull( index, java.sql.Types.BIT ) The SQL code, java.sql.Types.BIT, is used because the Hibernate BooleanType defines its code as java.sql.Type.BIT. Sybase JDBC converts the null to 0, apparently because Sybase does not allow nullable bit columns. This can be reproduced using an annotations unit test, Java5FeaturesTest.testAutoboxing().. Sybase maps bit columns to tinyint, so when the unit test is executed, the column in the underlying table is actually of type tinyint, not bit. Sybase allows nullable tinyint columns, so there should be no problem persisting a null value as null. I've verified that changing the call to: PreparedStatement.setNull( index, java.sql.Types.TINYINT ) persists the null value without being converted to 0. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira